Charge coupled device free from after image due to residual elec

Details Charge coupled device free from after image due to residual elec Charge coupled device free from after image due to residual elec

1990-02-20

1991-09-17

Munson, Gene M.

Electrical pulse counters, pulse dividers, or shift registers: c

Counting or dividing in incremental steps

Beam type tube

377 58, H01L 2978, G11C 1928

Patent

active

050499602

ABSTRACT:
A charge coupled device comprises a plurality of photo electric converting elements of the p-n junction diode type, and the photo electric converting elements are coupled to associated vertical shift registers through gate transistors, in which n-type impurity region of each photo electric converting element has a wide portion accumulating electric charges produced in the presence of an optical radiation and a narrow portion partially overlapped with a transfer gate electrode of the gate transistor and having a width not allowing any narrow channel phenomenon to take place, so that no residual electric charges is left in the n-type impurity region without producing any potential barrier between the wide and narrow portions.

REFERENCES:
patent: 3856989 (1974-12-01), Weimer
patent: 4322753 (1982-03-01), Ishihara
patent: 4484210 (1984-11-01), Shiraki et al.
patent: 4696021 (1987-09-01), Kawahara et al.

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